The Mount St. Helens eruption anniversary prompts investigation into the California earthquakes: eruption history, threat levels.

A study reveals the existence of pockets of magma beneath the volcanoes of the Cascade Range, with no signs of imminent eruptions.

Kilian Jornet - States of Elevation In September, elite mountaineer, ultrarunner, and endurance athlete Kilian Jornet ...

Earthquakes that shake the ground under Redding are a sign of something bigger happening deep below the far Northern California region, geologists say. The culprit is also responsible for much of what ...

Kilian Jornet climbed his 71st 14,000' peak, California's Mt. Shasta, on Sept. 30. Then he cycled 788km to the foot of Mt.

A hiker who summited Mt. Shasta earlier this month lost track of the trail on his way down and slid 2,000 feet to his death.